Consumers hoping to trade in their old "clunkers" for new vehicles through the Cash for Clunkers (or CARS) program are discovering the EPA changed fuel economy numbers for some cars last week, making it impossible to trade them in! Update.

The Cash For Clunkers bill passed the Senate as part of a larger spending measure. The details, explained in our Cash For Clunkers Guide, remain similar except funding's cut from $4 billion to $1 billion in the new joint bill.